EP2404365B1 - Moteur à rotor double - Google Patents

Moteur à rotor double Download PDF

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Publication number
EP2404365B1
EP2404365B1 EP10711136.1A EP10711136A EP2404365B1 EP 2404365 B1 EP2404365 B1 EP 2404365B1 EP 10711136 A EP10711136 A EP 10711136A EP 2404365 B1 EP2404365 B1 EP 2404365B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
housing
motor according
carriers
stator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10711136.1A
Other languages
German (de)
English (en)
Other versions
EP2404365A2 (fr
Inventor
Heinz Leiber
Thomas Leiber
Valentin Unterfrauner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CPM Compact Power Motors GmbH
Original Assignee
CPM Compact Power Motors GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CPM Compact Power Motors GmbH filed Critical CPM Compact Power Motors GmbH
Publication of EP2404365A2 publication Critical patent/EP2404365A2/fr
Application granted granted Critical
Publication of EP2404365B1 publication Critical patent/EP2404365B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/223—Heat bridges
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/227—Heat sinks

Definitions

  • the present invention relates to a double-rotor motor according to the preamble of claim 1.
  • Double rotor motors with single tooth technology and high efficiency, but low strength and poor heat dissipation are made WO 06/083097 .
  • WO04 / 004098 and US 5982070 known. These motors are characterized by a high efficiency of the magnetic circuit, since with the imprint of a current in the stator tooth torque is generated via two rotors. Single teeth are particularly advantageous in the excitation circuit, as stated in the above-mentioned applications.
  • Double rotors can be designed for high power and torque.
  • the exciter teeth, coils and fasteners must have a high rigidity.
  • the exciter teeth with coils must be built close together. Since the stator is cantilevered in a single rotor twin rotor motor, the teeth and coils must be supported on the housing with a high rigidity.
  • the change in the magnetic flux is in Double rotor motors very high, so that electrically conductive materials in the magnetic circuit are undesirable, since in these very high eddy currents are generated. Therefore, electrically conductive materials with a large cross-section, in particular in the region of the largest flux changes, as they occur in the poles and the air gaps, to avoid.
  • the WO2006 / 083097 shows such a double rotor motor.
  • the self-supporting coils with bobbin and yoke are sprayed to a stator.
  • the application does not show a cross section through the coils to detect the distance to the adjacent yoke. It can therefore be assumed that the wall thickness shown also applies in the circumferential direction and thus there is a large distance to the adjacent coil.
  • the torque support is essentially on the overmolded body and the ribbing on the side of the housing. Since primarily high outside moments act, the stator can support limited torque.
  • the WO 2004/004098 also shows a double rotor motor, in which the yokes are encapsulated with the bobbin.
  • the bobbins are centered with the wound coils in a housing over Positon istsstege a plastic body (Fig. 13A) and then cast with the plastic body and the housing with casting resin. Since the positioning webs have only a small width, their area moment of inertia Ia is very low, so that the positioning webs can transmit only small forces.
  • the casting resin has a known manner, a low modulus of elasticity, so that no high moments can be transmitted via the potting.
  • the tooth is primarily supported on the bobbin, which in turn is connected to the housing and support via the potting compound. The construction is thus only limited load and can only be used for engines with low torque load.
  • the heat dissipation in the motors of the prior art is very limited because the stator is unfavorably connected to the housing.
  • the stator is as shown in Fig. 9C ( WO 2006/083097 ), connected to the housing via plastic over a long path length with the radially inwardly offset housing.
  • the performance of the engine is very limited, as the Heat from the coils can not be dissipated.
  • the thermal conductivity of cast resin or molded plastic is very low, a large distance between coil and metal housing acts thermally insulating. The same applies to WO2006 / 083097 ,
  • Double rotor engines with high rigidity and efficiency are out EP 1879283 (Matsushita ) EP 1191673 (Denso ) and US 5260642 (Huss ) previously known. From the EP 1879283 and the EP 1191673 In each case, a stator structure is previously known, in which two rotors with permanent magnets are connected to one another via a shaft. The rotors are driven by a stator wound with exciting coils.
  • the stator is made in one piece and consists of inner and outer teeth with pole shoes and a tangential connecting web between the yoke legs. On each connecting web an excitation coil is wound in the circumferential direction, as it is with Fig. 8 of the EP 1879283 and with Fig.
  • the magnetic flux is generated tangentially in the connecting web.
  • the magnetic flux is divided in the yoke teeth in two magnetic partial flows.
  • One of the partial flows goes radially outward to the outer rotor and closes over the outer rotor and via the adjacent stator tooth radially inwardly to the connecting web.
  • the second sub-flow leads radially inwards and closes over the inner rotor, and is guided radially outwards over the adjacent stator tooth and closes over the connecting web.
  • EP 1191673 are different from the stator of the EP 1879283 the rotors are not connected to each other via a shaft. Instead, the relative rotor position of the outer and inner rotors is controlled via a control algorithm.
  • the from the EP 1191673 and EP 1879283 known winding technique is disadvantageous.
  • the tangential winding technique is very complicated; on the other hand, with automated winding, a good copper filling factor can not be achieved be because the covered by the pole pieces space during winding can be filled poorly.
  • the magnetic flux is generated by the connecting web in the tangential direction and then deflected by 90 ° in the radial direction. This is unfavorable for the efficiency of the magnetic circuits and precludes the use of soft magnetic material with grain orientation.
  • the JP 2005 269730 also shows a motor in which carrier elements are arranged between the stator coils carrying the exciting coils.
  • a motor comprising a stator made of aluminum, which is fixed to the housing, wherein the carrier has axially extending support elements with cooling channels.
  • the object of the invention is to provide a double rotor motor for high torques and power.
  • the invention is based on the idea that the coil carriers, which also form the poles and the yoke, are encapsulated by means of a plastic, wherein the plastic forms a carrier structure, which also forms between the individual coil carriers and coils.
  • the plastic combines during encapsulation with the housing or with a part connected to the housing, so that a stable unit is formed.
  • the plastic is preferably a high-strength plastic.
  • the injected between the bobbins plastic mass forms each carrier, which are advantageously formed in cross-section U-shaped, T-shaped or double-T-shaped.
  • the invention provides for utilizing the production-related space or distance between the coils, which is filled by the injected plastic and forms a support structure or a carrier.
  • an area moment of inertia Ia is achieved, which is greater by more than a factor of four compared to the bobbin. It can also be the entire yoke or the outer pole with a relatively thin wall of plastic encapsulated.
  • the reinforcement is supported with a high-quality plastic.
  • a thermoset is used in which a good heat-conductive filler, e.g. Boron nitride, embedded.
  • the encapsulation is connected to the housing with corresponding profiles and anchors.
  • stator tooth with a bodiless coil or with insulation parts only on the Zahnhalswandung and front side with a corresponding distance to the outer and inner pole. In this space formed by the distance then the material is injected.
  • the free space or distance between the individual yokes and the coils forms a double-T-carrier-shaped space which is filled by the plastic.
  • the plastic thus forms after spraying a cross-section double-T-beam-shaped carrier, which is anchored in the housing or connected to the housing part.
  • This cross-sectional contour thus a particularly good rigidity is achieved.
  • the cross-sectional contour of the carrier can advantageously extend into the correspondingly formed recesses of the housing or its associated part, so that a particularly good rigidity of the carrier results.
  • the recesses may be formed by their cross-sectional area even larger than the carrier cross-sectional area in the region of the rotor, so that there is a kind of common base on the carrier, which extends into the recesses of the housing or housing part.
  • reinforcing elements can be provided for reinforcing the plastic compound, which each extend with its one end into a recess and extend with its other end to the stator tooth or into the gap between the adjacent stator teeth.
  • the reinforcing elements can be embedded in the area of the outer pole shoes and / or the inner pole shoes.
  • stator teeth which can advantageously have a double-T-shape in cross-section, ie radially outside and inside have pole pieces, first wound axially and then positioned in the injection mold.
  • the stator in contrast to double rotors with high power and stiffness (prior art ( EP 1879283 (Matsushita ) EP 1191673 (Denso ) and US 5260642 (Huss )) no tangential connecting webs.
  • the magnetic flux is generated radially in this embodiment and closes over the outer rotor, the adjacent stator teeth and the inner rotor.
  • the individual teeth are firmly anchored on the molded plastic carrier or carrier elements with the housing and held in position.
  • the sprayed carrier elements are preferably T-shaped or particularly preferably double T-beam-shaped, so that the stator achieves a very high rigidity for radial and tangential loads.
  • the plastic to ensure a very efficient heat dissipation from materials with high thermal conductivity, but low electrical conductivity is performed.
  • FIG. 1 shows a cross-sectional view through a first possible embodiment of the motor according to the invention according to the section xx in Fig. 2 .
  • the support structure 35, 35a, 35b, 35c is made of a high-quality rigid and at the same time electrically insulating material with a high modulus of elasticity, preferably duroplastic with filler.
  • the cross-sectional contour of the individual carrier 35 formed by the injected mass is shown in more detail in the following figures.
  • the coil 4 is located with a yoke 1 and is held by this on the housing 12.
  • the encapsulation structure 35 which forms the individual carriers, has on the housing side in each case a thickening 35a in the form of a base, which extends to the axial side 1a of the yoke 1 and is anchored in the housing 12 in a corresponding recess 12b.
  • the encapsulation can be carried out in two process steps, so that another filler with better heat-conducting properties, eg boron-nitride, is used in region 35a and in region 35 a filler with a high modulus of elasticity, eg glass-fiber reinforced plastic.
  • a filler with better heat-conducting properties eg boron-nitride
  • the stator consists of isolated stator teeth 1 with pole shoes 1 a in the outer region and pole shoes 1 b in the inner region, which are wound with excitation coils 4.
  • the motor has an outer rotor 3a equipped with permanent magnets 2a and an inner rotor 3b equipped with permanent magnets 2b.
  • two return elements 24a, 24b are shown, which can be optionally provided. The magnetic inference can also be done via the rotors 3a, 3b. Between the pole shoes 1a, 1b and the rotors 3a, 3b and the optional return elements 24a, 24b are each air gaps 1f.
  • a stamped grid 23 may be provided, which is overmolded for contacting with, so that the contacting of the coil 4 takes place before encapsulation and thus the tool design is simplified.
  • a multi-part spray process is to provide that the Interlock injection molding compounds.
  • a corresponding toothing region and separation region of the casting masses is shown in FIG. 35d.
  • the housing 12 is to be designed in the region 12a such that the distance between the coil side 4a and the housing region 12a is minimized.
  • the housing portion 12a therefore widened towards the axis of rotation to be adapted to the coil contour. This ensures that the wall 35w produced by the encapsulation is as thin-walled as possible for good heat transfer.
  • the wall portion 35w can also be made with a plastic having good heat conduction properties.
  • a reinforcing insert 36 is injected with a high modulus of elasticity and heat conduction, which is pressed onto the stator teeth 1 in a form-fitting manner during injection by appropriate tools.
  • a further outer insert part 37 is optionally provided, which is connected by one or more recesses 40 in the inner insert part with the injection in the region 35c.
  • a connecting web or connecting ring 38 can be provided between the inserts 36 and 37 for further stiffening.
  • the insert 36, 37 may protrude laterally from the housing 12 and resiliently rest on the housing 12 for maintaining a bias voltage. This improves the bond, in particular when a metal material is used as the inserts 36, 37.
  • the insert 36, 37 is thin and provided with slot punchouts 37 a, as in FIG. 1a is shown.
  • the coil 4 On the side facing away from the housing 4b, the coil 4 is also encapsulated, wherein the spray mass forms reinforcing ribs 35b. These increase the stiffness and increase the surface area for heat removal by air cooling.
  • the air cooling is supported by a fan wheel 21.
  • For the corresponding air guide recesses 39 in the rotor and housing 12 may be provided.
  • the magnetic conclusions 24a and 24b are mounted fixed to the housing. Between the stator, rotors 3a and 3b and return terminals 24a and 24b are two air gaps 1f each. The rotors 3a and 3b are thin-walled. This then reduces the inertial mass of the rotor and the cooling channels 18 can extend axially in the housing, whereby the rotor cooling is improved.
  • the support structures 35 formed as double T-beams extend up to the inside of the yoke to increase the area moment of inertia Ia and thus to improve the tangential stress.
  • the radial web height of the carrier 35 is to be formed as large as possible, which leads to a high rigidity.
  • stator tooth is wound beforehand and positioned in position to the housing.
  • the FIG. 2a shows the double-T-beam 35 with a radially outer reinforcing member 37.
  • the reinforcing member 37 may alternatively be arranged relative to the excitation coils 4 but also radially inward. Of course, outside and inside reinforcing elements 37 can be arranged and injected.
  • the reinforcing element 37 is made of a poorly conductive metallic material, such as stainless steel, with cutouts 37a to reduce the current conductivity and thus the eddy current losses.
  • FIG. 2b shows the cut-T-carrier 35 with thickening 35a and the contour of the housing recess 12b, which is designed by injection molding, so that a secure anchoring comes about.
  • the housing recess 12b should correspond in contour to the cross-sectional contour of the carrier 35, so that a high rigidity results and the carriers extend into or through the housing wall. In this case, attention should be paid to a minimum use of materials, taking into account the necessary rigidity.
  • the Figure 2c shows an extension of the T-beam structure 35.
  • the beams 35 are connected to an outer ring 35e as part of the injection molding via the regions 35s which includes the outer poles 1a including the outer reinforcing ring 35e.
  • This ring 35e is very effective even with small wall thickness for stiffening under tangential loading.
  • both the outer and the inner yoke 1 a, 1 b are thin-walled by rings 35e and are connected to webs between the coils.
  • Duroplast is preferably suitable for producing a thin wall thickness.
  • the area E between the poles may optionally be made somewhat deeper for injection because of the formation of burrs.
  • the coil space between the poles can be fully utilized, which increases the efficiency.
  • a high rigidity with good heat dissipation can be achieved, so that it is possible to realize a large-capacity motor with a small diameter and relatively long self-supporting coils.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)
  • Manufacture Of Motors, Generators (AREA)

Claims (25)

  1. Moteur électrique comportant un rotor extérieur (3a) et un rotor intérieur (3b), étant précisé que le stator portant les bobines d'excitation (4) a la forme d'un cylindre creux et est disposé entre le rotor extérieur (3a) conçu en forme de pot et le rotor intérieur (3b), ledit stator est en outre relié côté frontal à un boîtier ou à une pièce (12) du moteur électrique reliée fixement au boîtier, étant précisé que le stator comporte plusieurs dents (1) s'appuyant contre des supports (35) qui s'étendent en direction axiale, caractérisé en ce que les supports (35) sont constitués d'une matière plastique coulée par injection, notamment de plastique thermodurcissable, remplissant l'espace entre les bobines d'excitation (4) et les dents de stator (1) respectivement adjacentes ,étant précisé que les supports (35) s'étendent dans le boîtier métallique ou à travers celui-ci, ou dans une pièce métallique (12) reliée fixement au boîtier ou à travers celle-ci, et s'appuient contre ladite pièce métallique, et que le boîtier ou la pièce (12) comporte une paroi avec des entailles (12b), notamment des ouvertures de pénétration en forme de fenêtre pour la fixation des supports (35).
  2. Moteur électrique conforme à la revendication 1, caractérisé en ce que les supports (35) présentent, en coupe transversale, une forme en T ou en double T.
  3. Moteur électrique conforme à la revendication 1 ou 2, caractérisé en ce que les dents de stator (1) présentent des masses polaires (1b) orientées dans le sens radial vers l'intérieur et des masses polaires (1a) orientées dans le sens radial vers l'extérieur, étant précisé que la matière des supports (27) est logée entre les zones latérales radiales (4a, 4b) des bobines d'excitation (4) et les cotés intérieurs (1e) des masses polaires (1a, 1b) et forme des parois tangentielles.
  4. Moteur électrique conforme à l'une des revendications 1 à 3, caractérisé en ce que la surface de la section transversale des supports (35) dans la zone (35a) situé entre le boîtier ou la pièce (12) et la dent de stator (1) et/ou les bobines d'excitation (4) est supérieure à la surface de la section transversale des supports (35) dans la zone située entre les bobines d'excitation et/ou les dents de stator adjacentes.
  5. Moteur électrique conforme à la revendication 1, caractérisé en ce que le contour des entailles correspond au contour de la section transversale des supports.
  6. Moteur électrique conforme à la revendication 5, caractérisé en ce que la surface de la section transversale des entailles (12b) est respectivement supérieure à la surface de la section transversale des supports (35) dans la zone située entre les bobines d'excitation et/ou les dents de stator adjacentes.
  7. Moteur électrique conforme à l'une des revendications 1 à 6, caractérisé en ce que le boîtier ou la pièce (12) est constitué en aluminium et est une pièce moulée sous pression.
  8. Moteur électrique conforme à l'une des revendications 1 à 7, caractérisé en ce que les supports (35) sont reliés radialement vers l'extérieur et/ou vers l'intérieur à une matière coulée par injection (35e) qui enrobe les masses polaires extérieures (1a) et/ou les masse polaires intérieures (1b).
  9. Moteur électrique conforme à l'une des revendications 1 à 8, caractérisé en ce que des éléments de renforcement (36, 37), notamment des éléments en forme de plaque ou recourbés en forme de plaque qui s'étendent en direction axiale, sont encastrés dans la coulée de plastique qui forme entre autres les supports (35).
  10. Moteur électrique conforme à la revendication 9, caractérisé en ce que le premier élément de renforcement (36) est relié solidairement à la dent de stator.
  11. Moteur électrique conforme à l'une des revendications 9 ou 10, caractérisé en ce que le deuxième élément de renforcement (37) s'étend sur une partie de la longueur axiale des supports (35) dans ceux-ci ou au-dessous ou au-dessus des supports (35).
  12. Moteur électrique conforme à l'une des revendications 9 à 11, caractérisé en ce que les éléments de renforcement (37) présentent chacun au moins une ouverture de pénétration (37a) en forme de fenêtre, notamment des fentes oblongues.
  13. Moteur électrique conforme à l'une des revendications 9 à 12, caractérisé en ce que les éléments de renforcement (36, 37) sont fabriqués dans un matériau dont la conductivité électrique est nulle ou insignifiante.
  14. Moteur électrique conforme à l'une des revendications 9 à 13, caractérisé en ce que les éléments de renforcement sont accrochés à la matière plastique via leurs ouvertures de pénétration (37a) et/ou sont reliés entre eux par le biais d'une entretoise/d'un anneau de liaison (38).
  15. Moteur électrique conforme à l'une des revendications 1 à 14, caractérisé en ce que la paroi (12a) du boîtier ou de la pièce (12) contigüe au côté axial (4a) des bobines d'excitation (4) est ajustée au contour du côté (4a) de telle sorte que seule une fine paroi (35w) de plastique sépare les bobines d'excitation (4) du boîtier ou de la pièce (12).
  16. Moteur électrique conforme à l'une des revendications 1 à 15, caractérisé en ce que l'extrémité axiale libre du stator située du côté opposé au boîtier ou à la pièce (12) comporte des nervures de renfort (35b) qui sont notamment constituées de la matière plastique formant les supports (35).
  17. Moteur électrique conforme à l'une des revendications 1 à 16, caractérisé en ce que l'extrémité axiale libre du stator située du côté opposé au boîtier ou à la pièce (12) comporte au moins un anneau de renforcement, en particulier en matière plastique ou en métal, qui est notamment au moins partiellement encastré dans le matériau des supports et relié aux dents de stator.
  18. Moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce qu'une première pièce de retenue externe (24a) comprend le rotor extérieur (1a) et qu'une deuxième pièce de retenue interne (24b) est englobée par le rotor interne (1a), étant précisé qu'il existe un entrefer (1f) entre d'une part la pièce de retenue externe (24a) et le rotor extérieur (1a) et d'autre part entre la pièce de retenue interne (24b) et le rotor intérieur (1b).
  19. Moteur électrique conforme à la revendication 18, caractérisé en ce que les pièces de retenue (24a, 24b) sont disposées sur le boîtier ou la pièce (12).
  20. Moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce que la coulée de matière plastique formant les supports (35) et les enrobages (35a, 35b, 35c, 35e) est constituée, par zones, de matériaux différents, étant précisé que dans les zones (35a) dans lesquelles une bonne conductivité thermique est nécessaire, un matériau possédant des propriétés de bonne conductivité thermique est injecté, et dans les zones (35) dans lesquelles une forte rigidité est nécessaire, un matériau très résistant est injecté, et les matériaux injectés dans les zones sont ancrés les uns dans les autres par des contre-dépouilles, de telle sorte que la matière des supports repose, dans le sens axial, radial et tangentiel, sur la masse de coulage possédant la plus haute valeur de conductivité thermique.
  21. Moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce que des canaux de refroidissement s'étendent notamment en direction axiale à travers le boîtier (12).
  22. Moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce que les bobines d'excitation (4) ne comportent pas d'enroulement.
  23. Moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce que pour obtenir une propriété de haute conductivité thermique, la matière plastique contient un agent de remplissage dont la conductivité thermique est plus élevée (par ex. le nitrure de bore).
  24. Procédé de fabrication d'un moteur électrique conforme à l'une des revendications précédentes, caractérisé en ce que le boîtier ou la bride de stator (12) du moteur est inséré(e) dans un dispositif d'injection et les parties de masses polaires (1) avec les bobines d'excitation (4) sont positionnées sur le boîtier ou la bride de stator (12), et facultativement, sont en contact avec une grille estampée (23), après quoi, ensuite, une matière plastique coulée par injection(35) est pressée dans le dispositif d'injection et pénètre dans les entailles et/ou les contre-dépouilles (12b) du boitier ou de la bride de stator (12) ainsi que dans les espaces situés entre les parties de masses polaires (1) et les bobines d'excitation (4), ce qui aboutit à la formation des supports (35) qui sont reliés au boîtier ou à la bride de stator (12).
  25. Procédé conforme à la revendication 24, caractérisé en en ce que des pièces de renforcement (36, 37), notamment des pièces de renforcement à paroi mince, sont coulées dans la matière de moulage par injection.
EP10711136.1A 2009-03-05 2010-03-05 Moteur à rotor double Active EP2404365B1 (fr)

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Application Number Priority Date Filing Date Title
DE102009011383 2009-03-05
PCT/EP2010/001383 WO2010099975A2 (fr) 2009-03-05 2010-03-05 Moteur à rotor double

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EP2404365B1 true EP2404365B1 (fr) 2014-07-23

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US (2) US8541923B2 (fr)
EP (3) EP2404366A2 (fr)
JP (1) JP2012519463A (fr)
KR (1) KR20110128334A (fr)
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WO (3) WO2010099974A2 (fr)

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Publication number Publication date
EP2404366A2 (fr) 2012-01-11
WO2010099974A3 (fr) 2011-11-10
EP2404365A2 (fr) 2012-01-11
CN102422512A (zh) 2012-04-18
WO2010099974A2 (fr) 2010-09-10
WO2010099975A3 (fr) 2011-11-03
WO2010099976A3 (fr) 2011-11-10
CN102428629B (zh) 2014-12-03
WO2010099976A2 (fr) 2010-09-10
KR20110128334A (ko) 2011-11-29
JP2012519463A (ja) 2012-08-23
WO2010099975A2 (fr) 2010-09-10
US20120133221A1 (en) 2012-05-31
EP2404367B1 (fr) 2017-09-20
US8541923B2 (en) 2013-09-24
CN102428629A (zh) 2012-04-25
EP2404367A2 (fr) 2012-01-11
US20120007453A1 (en) 2012-01-12

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